/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import com.example.android.apis.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

/**
 * This view is part of the {@link SecureView} demonstration activity.
 * 
 * This view is constructed in such a way as to obscure the buttons and
 * descriptive text of the activity in a poor attempt to fool the user into
 * clicking on the buttons despite the activity telling the user that they may
 * be harmful.
 */
public class SecureViewOverlay extends ViewGroup {
	private SecureView mActivity;

	public SecureViewOverlay(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public void setActivityToSpoof(SecureView activity) {
		this.mActivity = activity;
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		measureChildren(widthMeasureSpec, heightMeasureSpec);

		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	}

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		spoofLayout(findViewById(R.id.secure_view_overlay_description),
				mActivity.findViewById(R.id.secure_view_description));
		spoofLayout(findViewById(R.id.secure_view_overlay_button1),
				mActivity.findViewById(R.id.secure_view_unsecure_button));
		spoofLayout(findViewById(R.id.secure_view_overlay_button2),
				mActivity.findViewById(R.id.secure_view_builtin_secure_button));
		spoofLayout(findViewById(R.id.secure_view_overlay_button3),
				mActivity.findViewById(R.id.secure_view_custom_secure_button));
	}

	private void spoofLayout(View spoof, View original) {
		final int[] globalPos = new int[2];
		getLocationOnScreen(globalPos);
		int x = globalPos[0];
		int y = globalPos[1];

		original.getLocationOnScreen(globalPos);
		x = globalPos[0] - x;
		y = globalPos[1] - y;
		spoof.layout(x, y, x + original.getWidth(), y + original.getHeight());
	}
}
